A Value Output block is used to provide output value from a Custom Building block to outside of the block. The Value Output block shows the following properties:
The title of the block “Value Output” can be changed by double-clicking on it and typing in a new title.
Output defines the value that can be output from the custom building block. So to make it available outside of the custom building block, the ‘output’ should be connected to desired property of required block.
Updated January 12th 2018.